Available 
Bosch Series 4 WTH85225GB 8Kg Heat Pump Tumble Dryer
from £529.
£529
Rated 4.7 / 5 from up to 3,597 reviews
Colours tracked: White
Guide
Heat pump tumble dryers explained: are they worth it?
Heat pump tumble dryers can cost more upfront, but they usually use less energy, need no external vent and may suit homes that dry laundry often.
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Last verified: 2026-10-24
How heat pump tumble dryers work
Heat pump tumble dryers recycle warm air in a closed loop instead of creating new heat for every cycle, which is why they are usually the lower-energy option. AO’s guidance says that helps reduce running costs, while the trade-off is that drying can take longer because the machine works at a lower temperature. That makes them a sensible fit for shoppers who want efficiency and gentler drying more than the fastest possible turnaround.
Why they cost more upfront
The main reason heat pump tumble dryers feel pricier is that you are paying for a more efficient drying system rather than a basic drum-and-heater setup. In the examples here, the Bosch Series 4 WTH85225GB starts at £529, the Bosch Series 4 WTH85226GB is £629, and the Samsung Series 5 AI Energy OptimalDry™ DV90CGC0A0AB is £649, so the spread is real even before you compare features. That higher entry price can make sense if the dryer will be used often enough for lower running costs to matter.
Who should buy one
These dryers suit households that do laundry regularly and want a lower-energy option without needing an external vent. They are especially worth comparing if you dry bigger loads, because the shortlist spans Bosch 8kg models and a Samsung 9kg model, and capacity can change how many loads you need each week. If your main priority is the cheapest purchase price, a heat pump model may feel like a stretch; if your priority is long-term use and flexibility, the format is easier to justify.
Heat pump vs condenser dryers
Compared with condenser dryers, heat pump models are usually easier on energy use but slower in day-to-day drying. That means the choice is less about the category label and more about what matters in your home: lower running costs, quieter everyday use, or a faster cycle when you need laundry ready quickly. Because all three examples here are heat pump dryers, the useful comparison is between price, size, features and fit rather than drying technology type.
What to check before you buy
Before adding one to basket, check capacity, dimensions, clearance and whether the retailer page confirms ventless setup and any drain-hose connection option. AO also points shoppers toward sensor drying, delay timer, anti-crease and noise level, because those features affect daily convenience more than cosmetic details do. For the current shortlist, also check the latest price and offers on the Bosch Series 4 WTH85225GB at £529, the Bosch Series 4 WTH85226GB at £629 and the Samsung Series 5 AI Energy OptimalDry™ DV90CGC0A0AB at £649.
What the shortlist suggests for shoppers
The clearest takeaway is that heat pump dryers are worth considering if you want lower energy use, but the value depends on how often you use the machine and how much you care about drying speed. The Bosch models in this shortlist have the stronger review volume, while the Samsung model has the higher average rating and larger 9kg drum, so the better fit depends on whether you want proven popularity, a bigger capacity or a stronger spec for the money. Live product details still need checking before you buy, especially dimensions, noise level, delivery, warranty and the exact feature list on each page.
How to turn the shortlist into a buying decision
If you want the lowest upfront price, the Bosch Series 4 WTH85225GB at £529 is the starting point, but it gives up the larger 9kg capacity of the Samsung model. If you value a stronger average rating and a bigger drum, the Samsung Series 5 AI Energy OptimalDry™ DV90CGC0A0AB at 9kg and £649 looks more appealing, though its review count is lower than the Bosch models. The two Bosch 8kg dryers sit in the middle on price, with the WTH85226GB at £629 costing more than the WTH85225GB, so it makes sense to compare the live feature list, warranty, delivery and exact dimensions before deciding.
Electricals to use as comparison examples
Available 
Bosch Series 4 WTH85226GB 8Kg Heat Pump Tumble Dryer
from £629.
£629
Rated 4.7 / 5 from up to 3,597 reviews
Colours tracked: White
Available 
Samsung Series 5 AI Energy OptimalDry™ DV90CGC0A0AB 9Kg Heat Pump Tumble Dryer
from £649.
£649
Rated 4.9 / 5 from up to 541 reviews
Colours tracked: Black
Retailer details used
Last checked 2026-10-24. The source list below is included to help you check the details behind the comparison. Always confirm the latest price, delivery cost, stock status and product details with the retailer before buying.
- Energy Saving Trust appliance guideEfficiency and sensor drying guidance
- Bosch Series 4 WTH85225GB 8Kg Heat Pump Tumble DryerExact product specifications and public evidence
- Bosch Series 4 WTH85226GB 8Kg Heat Pump Tumble DryerExact product specifications and public evidence
- Samsung Series 5 AI Energy OptimalDry™ DV90CGC0A0AB 9Kg Heat Pump Tumble DryerExact product specifications and public evidence
- Energy Saving Trust Northern Ireland dryer labelsMarket-specific label transition and cold-room caveat
- Bosch WTH85226GBManufacturer specifications and conditional warranty
Helpful next reads
Use these related electricals guides and reviews to turn the advice into a practical shortlist.
Firmness questions
Do heat pump tumble dryers really save money on running costs?
They usually use less energy than vented or condenser dryers, so they can be cheaper to run if you use them regularly. The exact saving depends on how often you dry clothes and the model you choose, so check the retailer page for the latest energy rating and product details.
Are heat pump dryers slower than other tumble dryers?
Yes, slower drying is a common trade-off. AO’s guidance says heat pump dryers work at lower temperatures, which helps efficiency and fabric care, but it can mean cycles take longer than with other dryer types.
Is an 8kg or 9kg heat pump dryer better for my household?
An 8kg model can suit smaller or medium households, while a 9kg drum is easier to justify if you want to dry bigger loads or do fewer loads overall. In this shortlist, the Bosch models are 8kg and the Samsung model is 9kg, so capacity is one of the clearest differences to compare.
Do heat pump tumble dryers need a vent or special installation?
No external vent is needed, which makes them easier to place in more homes. You should still check the product page for dimensions, clearance space and whether a drain-hose connection is offered or if you will empty the water container yourself.
What should I check on an AO product page before I buy?
Check the current price, delivery details, warranty, dimensions, noise level and whether features such as sensor drying, anti-crease and delay timer are actually included. The live product page is also the best place to confirm fit and any installation notes.